Sectional boiler.



No, 872,495. I .BATENTEDDEO. 3, 1907. E. M. BOSLBY.

, SEOTIONAL BOILER.

APPLICATION FILED FEB. 9, 1907.

2 SHEETS-SHEET 1.

Y Q sQ I Wfinmsss: 0. .mW

PATENTED DEG. 3,1907

B; MLBds'LBY; SBGTIONAL BOILER.

APPLICATION FILED FEB. 1907- 2 SHBETSSHBHT 2.

iiliili Li in Hil tag/ M citizen of ,the United States,

view through To all whom it may ELIJAH M. BosLnr,cns ritoms, MissoUnr.

' snc'rronnr. noiLnn.

Specification of Letters Patent.

racemes ne 3, 1907;

Application 6155 ram 9. 1907. Serial No. 356.586.

concem: A

I, ELIJAH M. BosLEY, a

residing atStl. invented a certain new Be it known that Louis, Missouri, have and useful Improvement in Sectional Boilers,

of which the following is-a 'full clear, and exact description, such as will enable others skilled in the art to which it ap ertains to make and use the same, reference companying drawings, forming part of the specification, in which '5 Figure 1 is a vertical longitudinal sectional aboiler embodying the features of my invention; Fig. 2 is a detail sectional view of the outer end ,of one of the tubes which admit air above thegrate when-the main draft door is closed; Fig. 3 is a vertical sectional view taken on the line 3-3 of Fig. 2; 4 is a horizontal sectional view 3; This invention relates to lmilers forheateing had totheac tending over the grate and provided with hollow de ending portions 4' which extend downwar y on each side of the combustion chamber beneath the grate. portions 4 of thecrown are of the same widthas the water-legs 2, andare connectechto saidwater legs by hollow con- The depending" approximately 1 tracted Websv 5, as shown in Fig. 4, so that;

the portion of each section of the boiler ad jacent the combustion chamber. is'a proximately H-shapedin cross section. I e por-' tion 3 of the hollow water crown is connected tothe water chamber 6 at the upper endof each section by a vertically-disposed water chamber 7 that-forms the'inner sides of the horizontal 'flues -7 which extends longitudi nally of the boiler to the smoke pipe 8 pro-- titled with ,a' check damper 8", the outer sides of said flues being formed by the end wells?) of the hollow webs 5, said webs ex tending upwardly and connecting the poring systems, and particularly-to: the type of boiler described in my ending application SerialNo. 315,355,filed someof the novel features herein described/ can be embodied-in other types of boilers without departing from the spirit of my invention.

One objectof the inventlon herem described isto provide a down-drefr't sectional combustion chamber boiler having vertical fines leading from the beneath the grate to a horizontal flue at the upper ortion of the boiler which leads to the smo e pipe.

Another object of my invention-is to pro vide a sectional steam, boiler having .a circu- Fig. Biand also a lation on the water line so that all of the sec-- tions of the boiler will be heated uniformly. And still another object of my invention is to provide adown-draft sectional boiler provided with means for creating combustion above the grate during the suspensionof the draft from the main draft door. Other desirable features of my boiler will be hereinafter described. 1

Referring to the drawings which represent the preferred form" of my invention, designates the intermediate sections of theboilenf all of which are of the same sha e, and B and O designate, respectively,-the mm and rear sections'of the boiler. Each of the intermediate' sections has a. hollow water base '1 which connects the water legs 2, as shown in ollow watsrorown 3 exay 5, 1906, although ,tion 3 of the hollowwater crown with the water chamber 6, asshown in Fig. 3.

When the sections of the .boiler are placed to other the s aces between the contractedwe s 5 of each section will form verticallydisposed'fiues 10 bustion chamber horizontally extending the smoker pipe,

1 and 3, and thus heating the water in t e herb, and in the water ase 1.- Each section of the'boiler is a steam dome .12 and the sections are connectedf'w'ith each other at their upper andlower ends respectivel so that the water can circulate through al of the sectionsof the boiler, the nipples '13connecting the water chambers 6 .an the nipples 14 connecting the water bases 1.- The grate is formed by a plurality of hollow'sections 15, each of said sections the ont and rear sections of the boiler so that the water also circulates through the grate. As shown in Fig.1, the nipples which provided with that lead from the 00111 beneath the grate tothe v the fire traveling through these flues as lndicated by the arrows in-Fi s.'

' crown, in the'water' le s,- in the water cham' by means of nipples 13-and 14,-

- bein conneced by means ofnipples 16 to a connect thewater' rate sections to'the front and rear sections 0 the boiler, are expanded into the inner walls 17- of said front and rear sections, and the outer walls I and rear sections are provided with remov- 18 of said front ableplugs 19 in alinemehtwithsaidnipples,

thereby permitting an ex anding tool to be inserted into said front "and rear sections to expand said nipples. I

. The advantage of a construction of this character is that it enables the grate sections to be renewed with very little trouble, the plugs 19 being located in the outer walls of the front and rear sections "so that they are not subjected to fire and accordingly, can be removed easily. The grate,'as shown in F 1, is inclined u wardly from the front to the rear of the bo' er so as to cause the water'to circulateupwardly through the boiler. The main draft door is located above the grate and admits air above the fuel on the grate, thus causing the fire to pass downwardly and play ectly on the water bases 1- of the secpassing up-thevertical tions, the fire then ues 10 and out through the horizontal flues 7 to the smoke ipe. By constructing the sections of the boiler so thatvertical flues 10 r are formed between the water legs I am enabled to build a very short boiler as it is not necessary to use a number of sections at the rear of the inner end of the grate so as to provide a passageway through which the fire travels from the combustion chamber to the horizontally-disposed flues that lead to the smoke pipe. Another desirable feature of a oonstructlon of this character is that the ver: tical flues tend to draw the fire downwardly against the water bases and also divide the flame so that each section of the boiler'will get an equal division of .heat. :One feature of my invention which I believe is new in down-draft sectional boilers is providing means for creating combustion above the grate when the main draft door is closed so as to consume the gases which rise from the coal. This I accomplish bfi providing the boiler with a plurality of tu es 21 arran ed. horizontally over the grate and provi ed p with perforations 21*, preferably at their rear ends, through which airis admitted above the grate, the front ends of said tube extending through the front section of the boiler. and be' preferably provided with dam ers 22 wh i rdi permit'the uantity of air whic asses through said tu es to be varied. en the mam draft door 20 is closed air passes through these tubes 21 and becomes heated to a great temperature-and this heated air mixingwith the free gases that rise from the fuel produc$ combustion above the grate so that the underneath side of the crown 3 is subjectedto great heat.

This boiler can be used for either a steam or hot water system as each section is provided with a steam dome 1 2, as previously described. The boiler is herein Illustrated as being used for a steam heatin system and as there is awater connection etween the water chambers 6 of the'sections,-I' obtain a circulation on the water line through all of c5 the sections of the boiler,-thereby causingwfi of the sections to the sectional boilers which have heretofore been in use the water did not circulate 'di rectly through one section the top of the boilerso that' it was necessary water line from one sectioni'ntutheother as well as through the water bases so that I. am able to use that extends underneath only a few of the sections.

with a grate, over said grate and downwardly on each side of the combustion, chamber beneath the grate, and vertical flues leading from" the combustion chamber beneath the grate to horizontal flues which extend longitudinally of the boiler over said water crown; substan tia'lly as described. I 5

with 'water legs that are connected bases, a grate arranged over said'water bases," means for causing 'Wardly through sa d grates and pla on said water bases, and-vertical flues lea I the combustion chamber beneath the grate .to horizontal flues that lead to a-smoke pipe substantially asdescribed. v Y Y 4. A down-draft. boiler composed of sections having water bases connecting said I water crown extending downwardlyv on each side of the combustion chamber and connected by hollow contracted water le tween t ,e sections.- dependingportions of said crown terminating adjacent the waterbase to combustion chamber u wardly' through said flues, anda horizontal the hollow water crowns'and communicat' r the vertical flues; substantially asde- SOIl be'heated'unjfor nily. In.

into the othelfpt to have a grateextending underneath all of the sections to cause the water therintobe heated to a uniform temperature. T

In my boiler thefwater circulateion the f a very'short' grate, namely, one

Having thusdescribed my invention, what so I claim as 116W esire to secure by L e. ters Patent is: 1

1. A down-draft sectional boilerhaving a horizontal flue extending through the'uppen portion thereof, and vertically-disposed flues leading from the combustion chamber be.-; neath the grate to said horizontal flue substantially as described.

2. A down-draft sectional boiler provided a. hollow water crown extending 3. A down-draft sectional boiler rovided ywat'er the fire to pass downg fromhollowwater legs and 1liofiow I egs, a o ow webs to said s so as to produce vertical flues bepermit the fire to travel fromthe flue extending over ed. 5. A down-draft sectional boiler com rismediate sections of the boiler each consisting of water legs connected by a hollow water base, a hollow water crown extending downwardly on each side ofthe combustion chamber and connected to said water legs by con tracted hollow webs so as,to' form vertical fiues between the sections, the depending portions of each crown terminating adjacent the water base and, each of said sections be ing provided above the water crown with a horizontal flue o ening that communicates with said vertica flues; substantially'as de scribed. 4

7. Adowh-draft sectional boilerprovided withwater legs and a water base,-a grate 'arranged above the water base, a hollow water crown extending over the grate and downwardly on each side of the Combustion chamber,' a horizontal flue extending longitudinally of the boiler above-said crown, and

- means for causing the fire to travel downwardly betweenthe wardly through the epending portions of the crown and the water-legs to the horizontal flue; substantiallyas described.

8. A sectional boiler having a hollow water grate that is connected to theinner wall of a water chamber inthefront section, a sect on located at the rear of thefront section'and provided with a water chamber to the inner wall of which the rear end of the water grate is connected, and removable devices in the outer walls of the water chambers of said sections located adjacent the points a-t-which rate and thence up;

the water grate is connected to the inner;

walls of said chambers; substantially as de-- scribed. a i

9. A sectional boiler-- provided with a hol' V low water grate composedof a plurality of sections that are connected by means of nipples to the inner walls of water chambers in the front and rear sections of the boiler, and

removable plugs in the outer' walls of the tions located in alinement with said nipples; substantiall as described.

10; A boi' ercomposed of a plurality of sec water chambers in said front and rear sections each of which s provlded at its upper end withia steam dome and at its lower end with a water-base, water "connections be tween said water bases, water connections located below the domesfor connecting the f upper ends of thesections with each other, a ho" ow water grate connected to water chambers in the front and rearsections-of the boiler, means for creating a down draft through said grate, and vertical flues leading from the combustion chamber beneath the grate to a horizontal flue above the grate;

substantially asdescribed. Y 1

In testimon whereofI hereunto aflix my signature in t e presence of't'wo witnesses,

this sixth day of February 1 907'. ELIJAH M. BOSLEY. Witnesses vWELLs L- CHURCH, f GEORGE BJAKEWELL. 

